Buckle



FIG. 1 is a front view of a buckle of the claimed design.

FIG. 2 is a rear view of the buckle of FIG. 1.

FIG. 3 is a plan view of the buckle of FIG. 1.

FIG. 4 is a bottom view of the buckle of FIG. 1.

FIG. 5 is a right side view of the buckle of FIG. 1; and,

FIG. 6 is a perspective view of the belt adjuster of FIG. 1. 

The ornamental design for a buckle, as shown and described. 